Thermostatic regulator



May 29, 1928. 1,671,915

' R. T. WILLIAMS THERMOSTATIC REGULATOR Filed July 11, 1927 Patented May 29, 1928.

' UNITED STATES PATENT OFFICE.

ROBERT '1. WILLIAMS, OF QUINCY, ILLINOIS, ASSIGNOR TO B. M. SHEER COMPANY, OI QUINCY, ILLINOIS, A. CORPORATION OF ILLINOIS.

THERMOSTATIC REGULATOR.

' This invention relates to an improvement in thermostatic regulators. a The object of the invention is to cause uniform action of 'the control arm, regardless of whether one or all of the wafers are functioning. This is accomplished by the use of a heavy metal plate which w1ll not give, ben'dor warp, and therefore either one or the other of the wafers will actuate the plate if the other should become disabled in use or otherwise be inactive. A simple means of adjustment is provided through a single set-screw designed for adjusting the thermostatic regulator with a minimum of the amount of turning. -A quarter-turn of the set-screw increases the temperature five degrees and when adjusted it is not necessary that it should be re-adjusted unless it is desired to raise or lower the temperature required to substantially actuate the thermostatic control. The construction elimlnates any damageto the wafers through restricted expansion by a special form of connection between the control arm and the draft intake control disc.

This form of tandem wafer thermostatic regulator is designed for use in connection with brooders and for re ulating the temperature therein and may e connected with a coal-stove which heats the brooder for regulating the admission of air or draft thereto.

In the accompanying drawings:

Fig. 1 is a perspective \iew of the invention applied to a stove;

. Fig. 2 is an end. view thereof;

Fig. 3 is a horizontal sectional view through the wafer supporting mechanism;

Fig. 4 is a detail perspective view of the bracket arm and head; and

Fig. 5 is a sectional view of the support ing disk and plunger rod.

The invention is shown as applied to a coal-stove and in this connection the numeral 1 designates the stove which is provided with a preheated draft intake pipe. 2.

A damper 3 controls the admission of cold air to the top of the stove. J

A bracket-arm 4 is secured to the draft pipe 2, and extends outwardly therefrom 2. Wafer-thermostats 9 have the pins 10 thereof loosely extending into holes in the head 6 for removably supporting these thermostats thereby. These wafer thermostats are well-known in the art, and it is not necessary to describe their action in detail. 0

A yoke 11 is preferably made of cast-metal or some heavy material which is non-yieldable and non-bendable, so that when pressure is applied to either end. of it, it will cause an actuation of the entire yoke. This 05, yoke 11 is provided with oppositely-extending hooks; 12 on the upper edges thereof for hooking around the opposite sides of the rod 8, and pivotally supporting the yoke therefrom. The yoke extends down over the central portions of the wafers 9, and normally engages these wafers so that expansion of the wafers or either of them causes a movement of the yoke.

A lever 13 is provided with downturned ears 14, received and pivotally mounted on the rod 8, between the lugs 7, and the lever extends inwardly therefrom, as shown in Fig. 1. v

A plunger rod 15 is suspended through an 3 opening in the lever 13 and has adjusting and tightening nuts 16 thereon on opposite sides of the lever, and said rod: extendsv downwardly toward the draft 0 ening in the intake pipe 2. A head or en argement g5 17 is formed on the lunger rod 15 for normally supporting a oating disc 18, which is slidably received on the'rod and is adapted to rest upon the upper end of the intake pipe 2, or to be raised therefrom by the 00 head 17 to regulate the draft therethrough. A wire or suitable connection 19 extends from the extreme end of the lever 13 to the damper, 3 to control the damper from the thermostats.

The .lever 13 is rigid throughout, and bowed at its outer end to extend down immediately in front of the yoke 11. An adjustin screw 20 extends through the outer end 0 the lever 13 and engages the yoke 11 to adjust the tension on the yoke and wafer thermostats 9, and to regulate the required In the operation of the invention, it will be noted that upon the expansion of the wafers 9, the yoke 11 will be pushed outward a slight distance about its pivotal point upon the rod 8, which action is transmitted through the lever 13 to the disc 18, causing a movement of this disc to regulate the draft and air admission into and through the stove, and also through the wire 19 to the damper 3, causing a movement thereof correspondingly opposite to the movement of the disc 18, so that one closes when the other opens.

In other words, the expansion of the wafers 9 causes a rocking of the lever 13to lower its inner end and seat the disc 18 on the open end of the draft intake pipe 2. The loose connection between the disc and the plunger rod allows the latter to slide through the disc and down into the pipe 2, preventing any injury to the wafers 9. The same action of the lever 13 exerts a downward pull on the wire 19, opening the damper 3 to admit cold air to the to of the stove. The damper is opened aistance corresponding to the movement of the lever and wafers, this movement being allowed by the loose connection between the disc 18 and the end of the lever.

The construction is simple, and, by reason of the yoke being made heavy and of some non-yieldable material, the expansion of either of the wafers 9 will cause an actuation of the lever, and on the other hand should it be desirable to remove either of the wafers while the stove is heating the brooder, or at any other time, this may be done by merely pressing the yoke 11 outward, and the defective wafer removed, and another inserted in its place.

I claim:

1. The combination of a bracket-arm terminating in a head, thermostatic wafers carried by said head, an operating lever, and a stiff, unyielding yoke extending into position to be operated by the wafers and operatively connected with the lever.

2. The combination of a bracket-arm terminating in a head, thermostatic wafers carried by said head, an operating lever associated with the bracket-arm, and a relatively heavy non-yieldable yoke pivotally mounted on the head and extending into position to be operated by the wafers, said yoke having operative connection with and for actuating the lever.

3. The combination of a bracket-arm terminating in a head, thermostatic wafers carried by said head, an operating lever associated with the bracket-arm, a relatively heavy non-yieldable yoke pivotally mounted on the head and extending into position to be operated by the wafers, and means con-. nectin the yoke with the operating-lever.

4. T e combination with a stove having a draft-pipe associated therewith, of a bracket-arm connected with, and extending outwardly from the stove, and terminating 5.'The combination of a bracket-arm ter-' minating in a head, thermostatic wafers arranged side by side, and carried by the head, lugs extending upwardly from the head, a rod mounted in the lugs and extending approximately across the head, a relativel heavy non-yieldable yoke having upstan ing hooks embracing the rod for pivotally mounting the yoke thereon, said yoke extending into position to be operated by the wafers, an operating lever pivotally mounted on the rod, and having an end thereof extending to a point in proximit to the yoke, and an adjusting screw exten ing into the last-mentioned end of the lever for engaging the yoke and regulating the tension thereon.

6.The combination with a stove having a draft pipe associated therewith, of a bracket-arm connected with, and extending outwardly from the stove, and terminating in a head, thermostatic wafers arranged side by side and carried .by the head, ln s extending upwardly from the head, a ro su ported by the lugs and extending across t 0 head, a relatively heavy, unyieldable, unbendable oke having upstanding hooks embracing the rod for pivotally mounting the yoke thereon, said yoke extending into position to be operated by the wafers, an operating lever pivotally mounted on the rod, and having a resilient end thereof extending to a point in proximity to the yoke, an adjusting screw extending through said end of the lever for engaging the yoke and regulating the tension thereon, and a disc carried by the opposite end of the lever in position to regulate the draft through the draft pipe by the action of any of the thermostatic wafers.

7. The combination of an arm, thermostats associated therewith, an operating lever. carried by the arm for movement relative thereto, and a yoke movably mounted on the arm and extending into operative relation between the thermostats and lever for transmitting movement therebetween.

8. The combination of an 'arm, thermostatsassociated therewith, an operating III lever pivot-ally carried by the arm for movement relative thereto, and a yoke pivotally mounted on the arm and extending into operative relation between the thermostats and 5 lever for transmitting movement therebetween.

9. The combination of an arm, thermostats associated therewith in spaced relation,

an operating lever associated with the arm, and a relatively stifi, unyielding yoke extending into 0 erative relation between the thermostats an lever for actuating the lever upon operation of at least any one of the thermostats.

'In testimony whereof I aflix m signature.

ROBERT T. WI LIAMS. 

